- Gadwall
- Galah
- Galapagos Penguin
- Gang-gang Cockatoo
- Garden Sunbird
- Garganey
- Germain's Peacock-Pheasant
- Giant Coot
- Giant Coua
- Giant Cowbird
- Giant Hummingbird
- Giant Kingfisher
- Giant Pitta
- Giant Wood Rail
- Gilded Sapphire
- Glaucous Gull
- Glossy-black Thrush
- Glossy Ibis
- Golden-backed Weaver
- Golden-breasted Bunting
- Golden-breasted Starling
- Golden-collared Macaw
- Golden-crested Myna
- Golden-fronted Leafbird
- Golden-fronted Woodpecker
- Golden-naped Tanager
- Golden-shouldered Parrot
- Golden-tailed Woodpecker
- Golden Eagle
- Golden Parakeet
- Goldie's Lorikeet
- Goliath Heron
- Goliath Imperial Pigeon
- Graceful Prinia
- Grassland Yellow Finch
- Great-tailed Grackle
- Great Argus
- Great Black-backed Gull
- Great Blue Heron
- Great Blue Turaco
- Great Bowerbird
- Great Bustard
- Great Cormorant
- Great Crested Grebe
- Great Cuckoo-Dove
- Great Egret
- Great Frigatebird
- Great Grey Owl
- Great Kiskadee
- Great Lizard Cuckoo
- Great Myna
- Great Potoo
- Great Skua
- Great Spotted Woodpecker
- Great Stone-curlew
- Great Tit
- Great White Pelican
- Greater Antillean Grackle
- Greater Blue-eared Starling
- Greater Coucal
- Greater Crested Tern
- Greater Flamingo
- Greater Racket-tailed Drongo
- Greater Rhea
- Greater Roadrunner
- Greater Scaup
- Greater Vasa Parrot
- Greater White-fronted Goose
- Greater Yellowlegs
- Green-backed Camaroptera
- Green-backed White-eye
- Green-billed Malkoha
- Green-throated Carib
- Green-winged Pytilia
- Green Aracari
- Green Broadbill
- Green Heron
- Green Honeycreeper
- Green Imperial Pigeon
- Green Kingfisher
- Green Oriole
- Green Peafowl
- Green Pygmy Goose
- Green Rosella
- Green Sandpiper
- Green Wood Hoopoe
- Grey-backed Camaroptera
- Grey-backed Fiscal
- Grey-breasted Martin
- Grey-capped Flycatcher
- Grey-chested Dove
- Grey-crested Cacholote
- Grey-eared Honeyeater
- Grey-headed Batis
- Grey-headed Fish Eagle
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-headed Lovebird
- Grey-headed Swamphen
- Grey-winged Trumpeter
- Grey Butcherbird
- Grey Catbird
- Grey Crowned Crane
- Grey Fantail
- Grey Go-away-bird
- Grey Gull
- Grey Heron
- Grey Kingbird
- Grey Parrot
- Grey Partridge
- Grey Peacock-Pheasant
- Grey Pileated Finch
- Grey Plover
- Grey Shrikethrush
- Grey Teal
- Grey Wagtail
- Greyish Baywing
- Greylag Goose
- Griffon Vulture
- Groove-billed Ani
- Grosbeak Starling
- Groundscraper Thrush
- Guanay Cormorant
- Guinea Turaco
- Guira Cuckoo